US Patent No: 4,593,777

Number of patents in Portfolio can not be more than 2000

Drag bit and cutters

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

A drill bit comprises a bit body having an operating end face. A plurality of self-sharpening cutters are mounted in the bit body and extend through the operating end face. The cutters have cutting faces adapted to engage an earth formation and cut the earth formation to a desired three-dimensional profile. The cutting faces define surfaces have back rake angles which decrease with distance from the profile. The individual cutting faces may be inwardly concave in a plane parallel to the intended direction of motion of the cutter in use. Each of the cutting members has a stud portion disposed in a respective recess in the bit body and defining the inner end of the cutting member, the cutting face being generally adjacent the outer end and having an outer cutting edge. The centerline of the stud portion is rearwardly inclined, from the outer end to the inner end, with respect to the direction of movement in use, taken at the midpoint of the cutting edge, at a first angle from 80.degree. to 30.degree. inclusive. The cutting face is oriented such that the tangent to the cutting face at the midpoint of the cutting edge and in the center plane of the cutting member is disposed at a second angle, for 18.degree. to 75.degree. inclusive, with respect to the centerline of the stud portion.

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First Claim

Related Publications

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Patent Owner(s)

Patent OwnerAddressTotal Patents
CAMCO INTERNATIONAL INC.HOUSTON, TX311

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Barr, John D Cheltenham, GB2 43 1684

Cited Art

Patent Info (Count) # Cites Year
 
CAMCO INTERNATIONAL INC. (1)
4,350,215 Drill bit and method of manufacture 54 1980
 
GENERAL ELECTRIC COMPANY (1)
4,200,159 Cutter head, drill bit and similar drilling tools 69 1977
 
REED HYCALOG OPERATING LP (1)
4,505,342 Drill bit 35 1982

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
BAKER HUGHES INCORPORATED (26)
5,172,778 Drill bit cutter and method for reducing pressure loading of cutters 30 1991
5,373,908 Chamfered cutting structure for downhole drilling 13 1993
5,431,239 Stud design for drill bit cutting element 15 1993
5,924,501 Predominantly diamond cutting structures for earth boring 22 1996
5,706,906 Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped 86 1996
5,881,830 Superabrasive drill bit cutting element with buttress-supported planar chamfer 40 1997
6,000,483 Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped 65 1998
6,412,580 Superabrasive cutter with arcuate table-to-substrate interfaces 2 1998
6,321,862 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability 39 1998
6,173,797 Rotary drill bits for directional drilling employing movable cutters and tandem gage pad arrangement with active cutting elements and having up-drill capability 51 1998
6,082,223 Predominantly diamond cutting structures for earth boring 21 1998
6,202,770 Superabrasive cutting element with enhanced durability and increased wear life and apparatus so equipped 41 1999
6,571,891 Web cutter 16 2000
6,527,069 Superabrasive cutter having optimized table thickness and arcuate table-to-substrate interfaces 22 2000
6,672,406 Multi-aggressiveness cuttting face on PDC cutters and method of drilling subterranean formations 53 2000
6,290,007 Rotary drill bits for directional drilling employing tandem gage pad arrangement with cutting elements and up-drill capability 19 2001
6,772,848 Superabrasive cutters with arcuate table-to-substrate interfaces and drill bits so equipped 1 2002
7,000,715 Rotary drill bits exhibiting cutting element placement for optimizing bit torque and cutter life 7 2002
7,066,288 Asymmetric compact for drill bit 4 2002
6,739,417 Superabrasive cutters and drill bits so equipped 16 2003
7,243,745 Cutting elements and rotary drill bits including same 8 2004
8,087,478 Cutting elements including cutting tables with shaped faces configured to provide continuous effective positive back rake angles, drill bits so equipped and methods of drilling 0 2009
8,327,955 Non-parallel face polycrystalline diamond cutter and drilling tools so equipped 0 2009
8,172,012 Cutting tool insert and drill bit so equipped 0 2010
8,434,572 Cutting elements for downhole cutting tools 0 2010
8,327,957 Downhole cutting tool having center beveled mill blade 0 2010
 
SMITH INTERNATIONAL, INC. (7)
4,858,707 Convex shaped diamond cutting elements 64 1988
6,164,394 Drill bit with rows of cutters mounted to present a serrated cutting edge 23 1996
6,564,886 Drill bit with rows of cutters mounted to present a serrated cutting edge 17 2000
7,461,709 Multiple diameter cutting elements and bits incorporating the same 0 2004
7,757,785 Modified cutters and a method of drilling with modified cutters 1 2007
8,127,863 Drill bit having enhanced stabilization features and method of use thereof 0 2008
8,113,303 Modified cutters and a method of drilling with modified cutters 0 2010
 
HALLIBURTON ENERGY SERVICES, INC. (3)
5,333,699 Drill bit having polycrystalline diamond compact cutter with spherical first end opposite cutting end 18 1992
6,003,623 Cutters and bits for terrestrial boring 72 1998
6,302,224 Drag-bit drilling with multi-axial tooth inserts 38 1999
 
WEATHERFORD/LAMB, INC. (3)
5,908,071 Wellbore mills and inserts 7 1997
5,984,005 Wellbore milling inserts and mills 5 1997
6,170,576 Mills for wellbore operations 18 1999
 
AMOCO CORPORATION (2)
4,932,484 Whirl resistant bit 68 1989
RE34435 Whirl resistant bit 40 1992
 
DIAMOND INNOVATIONS, INC. (2)
D330206 Stud-mounted polycrystalline diamond cutting blank 3 1989
D324527 Stud-mounted polycrystalline diamond cutting blank 13 1989
 
DRESSER INDUSTRIES, INC. (2)
4,753,305 Cutter mounting for drag bits 11 1987
5,033,560 Drill bit with decreasing diameter cutters 28 1990
 
VAREL INTERNATIONAL IND., L.P. (2)
6,904,983 Low-contact area cutting element 11 2003
8,191,656 Auto adaptable cutting structure 0 2010
 
AMERON IRON WORKS USA, INC. (1)
4,732,364 Wear resistant diamond cladding 34 1985
 
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION (1)
6,868,848 Cutting tool and method of using same 3 2002
 
DENNIS TOOL COMPANY (1)
5,456,329 Bifurcated drill bit construction 6 1994
 
ELEMENT SIX (TRADE MARKS) (1)
7,730,977 Cutting tool insert and drill bit so equipped 3 2005
 
NL PETROLEUM PRODUCTS LIMITED (1)
4,679,639 Rotary drill bits and cutting elements for such bits 26 1984
 
REED HYCALOG OPERATING LP (1)
4,640,375 Drill bit and cutter therefor 22 1984
 
REED TOOL COMPANY (1)
5,025,874 Cutting elements for rotary drill bits 70 1989
 
REEDHYCALOG UK LTD. (1)
4,942,933 Relating to rotary drill bits 24 1988
 
SMART DRILLING AND COMPLETION, INC. (1)
5,615,747 Monolithic self sharpening rotary drill bit having tungsten carbide rods cast in steel alloys 59 1996
 
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE INTERIOR (1)
5,078,219 Concave drag bit cutter device and method 16 1990
 
WEATHERFORD U.S., INC. (1)
5,626,189 Wellbore milling tools and inserts 8 1995